expected: |
  3,6,2
query: |
  with cte as (
    select 1 as 'col'
    union
    select 2
    union
    select 3
  )
  select
    (select count(*) from cte) as 'count',
    (select sum(col) from cte) as 'sum',
    (select avg(col) from cte) as 'avg'
